''Godzilla - Ultraman - Gamera: All Monsters Attack!'' is a fan-made OpenBOR game created by Aaron and Corwin Sands.
An army of Giant Monsters has been unleashed upon the world, and only eleven Kaiju are ready to save the earth in an epic struggle between good and evil! The main game mode plays like a classic side scrolling arcade beat em up. Up to four players fight their way through hordes of enemies before fighting a boss at the end of each level. The game gets progressive harder although NPC allies help out on some levels, and there are rest levels with extra life items as well.
A grueling single level challenge where you must defeat every enemy, sub-boss, and boss in the entire game. There are no NPC's, health items, or extra life items…
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